Stack-based buffer overflow in SonicOS - CVE-2025-40601
Published: November 20, 2025
Vulnerability identifier: #VU118630
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-40601
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error within the SonicOS SSLVPN interface. A remote attacker can send specially crafted packets to the SSLVPN interface, trigger a stack-based buffer overflow and perform a denial of service (DoS) attack.
Affected software
SonicOS
How to mitigate CVE-2025-40601
Install updates from vendor's website.
SonicOS - addressed in versions 7.3.1-7013, 8.0.3-8011